Manufacture of window regulators



B. S. FLORADY MANUFACTURE OF WINDOW REGULATQRS Filed Dec. 127, 1,927

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Patented dan. h6. i932 MURTUN t3. EEWJL'D OFLOLEJDO, UEM), ASSGNOR, BY MESNE ASSIGNMENTS, T0 THE DUE-th MEANY, F TDLEIDO, OHM), A ,CORPORATION 0F OHIO MN'UFUTURE 01E WNDOW REGULATORS .application filed luccember a?, 19m'. 'Serial No. 242,950.

The invention relates to the manufacture oflifter elements for window regulators and one of the objects of the invention is to so construct the parts of the lifter element that n they may be economically manufactured and assembled to form a strong and substantial unit. Another object is the manufacture of the gear segments with the minimum loss of material and with the minimum cost. "With .in these as well as other objects in view, the invention resides in the novel features of construction and combinations `and arrangements of parts as more fully hereinafter set forth.

l'n the drawings i Figure l is a side elevation of a window regulator lifter yelement comprising a gear segment anda lifter arm g Figure 2 is a bottom view thereof;

ligure B is a plan view of the blank from which the gear` segments are formed andy showing the lines of severing.

its shown in Figures l and Q, the lifter elenient comprises the lifter arm l and the gear segment 2, the arm being adapted to he conwhich progressively increases from its en ds to its center so that flexing or bending of the rack when in operation is avoided. The lifter arm is also formed of sheet metal and extends at one side of the gear segment and is rigidly connected to the anchoring portions i by suitable means such as the rivets 5. rThe central portion 6 of the lifter arm intermediate the anchoring portions is inwardly oset to extend in the plane of the gear segment, this central portion having the aperture 7 through which extends the pivot for the lifter element, the arrangement being such that tendency of the lifter element being l tilted by driving of the gear segment through the driving pinion is minimized.

To economically manufacture the gear segment 2, l provide the sheet metal blank 8, preferably having a width lequal to the length of the gear segment, which is determined by ythe distance between the ends 9 of the anchoring portions 4:. This blank is then progressively fed longitudinally through a suitable machine having a reciprocable punch which severe the blank progressively into a series of gear segments with one nesting within another and a part of the toothed outer periphery of the one coinciding with the inner peripher of that immediately in advance, the metallic pieces lO between the anchoring p0rtions 4 of the successive gear segments being scrapped.

With this method, it will be seen that but very little metal is wasted and that the gear segments are formed with the minimum of time, inasmuch as the lines of severing therebetween coincide with the tooth contours. It will be furthermore `seen that with this method the gear segments are formed with depths which progressively increase from their ends to their centers. With this construction the gear segments may be quickly and economically secured to the lifter arms .and form lifter elements of strong and substantial construction.

What I claim as my invention is:

1. In the manufacture of gear segments, each having a peripheral arcuate series of teeth, that step which consists in severing a blank into like gear segments the outer periphery of one segment coinciding substantially its entire length with the inner periphery of the adjacent segment.

2. In the manufacture of window regulator gear segments, that step which consists in severing a blank into like ar'guate racks with one nesting within another.

3. ln the manufacture of window regulator gear segments, each having an arcuate series of teeth at its outer periphery, that step which consists in severing a blank into like gear segments,y part of the outer periphery of one coinciding with the inner periphery of another.

4. In the manufacture of window regulator gear segments,- each having an arcuate series of teeth at the outer periphery, that step which consists in sevenng a blank to formthe arcuate series of teeth and simultaneously the inner periphery of an adjacent gear segment- 5. In the manufacture of a-window regu-A lator, the severing of a blank into like gear segments with one nesting Within another and each having anchoring ends7 and the securing of a li r arm to the anchoring portions of each gear segment.

6. In the manufacture of a window regulator, the severing of a blank intolike gear segments, eacli having anchoring ortions at its ends and the securing of a li er arm to the anchoring portions of each gear.

7. In the manufacture of a window regulater, the severing of a blank into like crescent shaped gear segments each having an outer arcuate series of teeth at the outer periphery, each having anchoring ortions at its ends, and the securing of a li ter arm to the anchoring portions of each gear.

In testimony whereof I affix my signature.

BURTON S. FLORADAY.

ortions at its 

